0-3 foot
0-2 foot
4-7++ foot
1-4 foot

A high surf advisory is in effect for south facing shores of all islands, as swells generated in the South Pacific last week continue to build in island waters. Some south shore breaks may see sets occasionally reaching several feet overhead. Latest spectral data from the buoys at Barbers Point and Lanai continue to indicate values near those that are typically associated with south shore high surf events historically. Elevated surf is expected to continue through Tuesday, and an extension in time may be required for the advisory. As trade winds strengthen early next week, expect an increase in the choppy wind-driven waves along east facing shores. Peak surf heights are expected to approach the high surf advisory threshold along the east facing shores as well. Trade winds are locally breezy, but are currently below small craft advisory (SCA) speeds. Strong high pressure building far north of the area Sunday night and Monday will require a SCA for at least windy areas around Maui and the Big Island, and potentially other zones as well. This will remain the case for most of next week.

Hawaii Wave Height Model

Hawaii Swell Period Model
Hawaii Swell Height Model

Tide Predictions

Low tide at Kahului was 0.6 foot at 2:48 AM late last night, rising to a high of 0.9 foot at 7:55 AM this morning, then dropping to a low of 0.7 foot at 12:22 PM just after noon, before once again rising to a high of 1.8 foot at 7:57 PM early this evening

The sunrise was at 05:43 am this morning and will set at 07:08 pm this evening. The Moon is currently 7 days old, and is in a Quarter phase. The next Waxing Gibbous will occur at 11:04 AM on Monday, June 20th.

Hawaii Wind Report

Maui Weather

Wind: n/a at 0 mph
current observations as of 3am December 17th, 2018

Weather Outlook for Saturday

Moderate trade winds will continue through the weekend, become stronger Sunday night and Monday, and remain gusty for most of the next week. A fairly wet trade wind weather pattern is expected over the next couple of days as a disturbance aloft approaches from the east, and passes over the island chain. Expect bouts of clouds and showers to pass over the islands in the trade wind flow, with windward showers occasionally spreading leeward on the smaller islands. The atmosphere may become sufficiently unstable to support the development of locally heavy downpours, and possibly a thunderstorm, mainly Sunday and Monday.

Currently, a nearly stationary 1032 mb surface high is centered around 1250 miles to the north-northeast of Oahu. Meanwhile, a surface trough is located around 375 miles east of the Big Island, associated with nearby closed low aloft, with both features tracking toward the west at 10 to 15 mph. Latest satellite images show enhanced moisture associated with these features, with clouds tops as high as 35 kft, in an area 350 to 550 miles east of the Big Island. A few lightning strikes were detected overnight in this area as well. Closer to the islands, an area of broken to overcast showery low clouds noted over windward waters Friday night is now over most islands, but the back edge is beginning to clear the islands from east to west. Latest sounding data indicates that the subsidence inversion remains in place over the islands, but is weaker than normal at a height around 8-10 kft.

Today and tonight… High pressure to the north-northeast will support moderate to locally breezy trade winds as the surface trough/low aloft to the east track toward the islands. The expectation is that the area of clouds and showers now traversing the islands will clear to the west by this afternoon on Kauai, and a little sooner over the other islands. So a cloudy and showery morning should turn drier and sunnier as the day progresses. Latest GFS guidance keeps much of the moisture associated with the approaching trough over windward waters tonight, and does not indicate organized moisture sources moving over the islands. Meanwhile, the latest ECMWF guidance brings more of this moisture into the islands, starting with windward portions of Maui and the Big Island late tonight. Latest official forecast is more in line with ECMWF, and depicts a wet trade wind pattern.

Sunday through Wednesday… The subtle surface trough will push west across the island chain Sunday, leading to a slight weakening of the pressure gradient, and slightly diminished trade winds. The trough will pass west of the islands Sunday night and Monday, as the high to the distant north-northeast strengthens to near 1039 mb. This strong high will move slowly west through Wednesday, and will support strong trade winds beginning Sunday night.

The low aloft will be gradually weakening as it moves west over the island chain from the east, but latest guidance continues to indicate moisture and instability will be great enough to support locally heavy showers and possibly even thunderstorms. Peak instability and moisture is expected Sunday and Monday, and phase especially well over windward waters. The expectation is that a wet trade wind flow will focus numerous showers over windward areas, occasionally spreading to leeward areas, especially as trade winds strengthen. Current forecast indicates a chance of thunderstorms on Maui and the Big Island Sunday afternoon, and now also contains a slight chance of thunderstorms over windward waters Sunday night, and over Kauai and Oahu Monday morning.

The low aloft will weaken to a trough as it gradually moves east of the area Tuesday and Wednesday. While the atmosphere will gradually become more stable, inversion heights and PWAT will remain elevated through the period, and strong trade winds will maximize orographic forcing as well. Thus the forecast calls for a wet trade wind regime.

Thursday and next Friday… Breezy trade winds will continue, supported by strong high pressure to the north. Although confidence is low, a typical trade wind weather pattern on Thursday may lead to a wetter pattern on Friday. Latest GFS guidance indicates that moisture associated with a dissipated front will get caught up in the trade wind flow, leading to increased moisture. A trough aloft extending over the area from the northeast may add to atmospheric instability.

Central Valley (Kahului, Spreckelsville):

HIGH SURF ADVISORY IN EFFECT UNTIL 6 PM HST SUNDAY. Breezy. Sunny with isolated showers. Highs 85 to 90. Northeast winds 10 to 20 mph. Chance of rain 20 percent.

Leeward West (Lahaina, Ka`anapali):

HIGH SURF ADVISORY IN EFFECT UNTIL 6 PM HST SUNDAY. Breezy. Mostly sunny with isolated showers. Highs 81 to 88. Northeast winds 10 to 20 mph. Chance of rain 20 percent.

Windward West (Wailuku, Waiehu):

Mostly cloudy. Showers likely in the evening, then occasional showers after midnight. Lows 59 to 71. East winds 10 to 15 mph. Chance of rain 90 percent.

Windard Haleakala (Hana, Haiku, Makawao):

HIGH SURF ADVISORY IN EFFECT UNTIL 6 PM HST SUNDAY. Mostly cloudy. Occasional showers in the morning, then scattered showers in the afternoon. Highs around 82 at the shore to around 69 at 5000 feet. East winds 10 to 15 mph with gusts to 30 mph. Chance of rain 90 percent.

Leeward Haleakala (Kihei, Wailea, Makena):

HIGH SURF ADVISORY IN EFFECT UNTIL 6 PM HST SUNDAY. Sunny. Isolated showers in the morning. Highs around 89 at the shore to 71 to 76 upcountry. Light winds becoming southwest around 10 mph in the late morning and afternoon. Gusts up to 25 mph. Chance of rain 20 percent.

Haleakala Summit

Mostly cloudy in the evening then becoming partly cloudy. Scattered showers. Lows around 49 at the visitor center to around 43 at the summit. East winds 10 to 15 mph. Chance of rain 50 percent.

Photo of the Day

Surf Photo of the Day - June 11th, 2016